Patents by Inventor Wolfgang Klenk
Wolfgang Klenk has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9239320Abstract: A method for verifying the plausibility of a measuring device for determining a quality of an aqueous urea solution in a reservoir of an SCR catalyst system comprises determining whether a filling of the reservoir has taken place, determining the quality of the aqueous urea solution in the reservoir and detecting whether an error of the measuring device is present or whether the reservoir was filled with an aqueous urea solution, the quality of which deviates from a default value consisting of a filling status of the reservoir and the quality of the aqueous urea solution in said reservoir.Type: GrantFiled: May 31, 2013Date of Patent: January 19, 2016Assignee: Robert Bosch GmbHInventors: Wolfgang Klenk, Matthias Burger, Reinold Weinmann, Wilhelm Dueck
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Publication number: 20130319070Abstract: A method for verifying the plausibility of a measuring device for determining a quality of an aqueous urea solution in a reservoir of an SCR catalyst system comprises determining whether a filling of the reservoir has taken place, determining the quality of the aqueous urea solution in the reservoir and detecting whether an error of the measuring device is present or whether the reservoir was filled with an aqueous urea solution, the quality of which deviates from a default value consisting of a filling status of the reservoir and the quality of the aqueous urea solution in said reservoir.Type: ApplicationFiled: May 31, 2013Publication date: December 5, 2013Inventors: Wolfgang Klenk, Matthias Burger, Reinold Weinmann, Wilhelm Dueck
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Patent number: 8479497Abstract: The invention provides for a method for operating an SCR catalytic converter for the aftertreatment of exhaust gases of an internal combustion engine, wherein a reducing agent tank (1) with reducing agent and a reducing agent metering device (8) are provided. The reducing agent tank (1) has at least one tank heater (3) having PTC characteristics. A variable characterizing the heater current is acquired for detecting cavities (10) in the reducing agent tank (1) when the reducing agent is frozen. The presence of cavities is suggested from a deviation of the acquired value or values for the variable characterizing the heater current from a predeterminable reference value, which represents a reducing agent tank without cavities.Type: GrantFiled: March 23, 2010Date of Patent: July 9, 2013Assignee: Robert Bosch GmbHInventors: Georgios Lolas, Wolfgang Klenk, Andreas Wagner
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Patent number: 7937931Abstract: A procedure is introduced to operate a diesel engine, which has a catalytic converter with three-way conversion characteristics. The procedure is characterized thereby, in that if the engine rotational speed increases without in the process exceeding an engine rotational speed threshold value and the engine's load is greater than a load threshold value, the diesel engine is operated in such a manner that the diesel engine alternately generates an oxidizing and a reductive exhaust gas atmosphere before the catalytic converter. Additionally a control unit is introduced, which controls the sequence of the procedure.Type: GrantFiled: September 4, 2007Date of Patent: May 10, 2011Assignee: Robert Bosch GmbHInventors: Andreas Pfaeffle, Wolfgang Klenk, Frank Schweizer, Stefan Scherer, Andreas Schaffrath
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Publication number: 20100236243Abstract: The invention provides for a method for operating an SCR catalytic converter for the aftertreatment of exhaust gases of an internal combustion engine, wherein a reducing agent tank (1) with reducing agent and a reducing agent metering device (8) are provided. The reducing agent tank (1) has at least one tank heater (3) having PTC characteristics. A variable characterizing the heater current is acquired for detecting cavities (10) in the reducing agent tank (1) when the reducing agent is frozen. The presence of cavities is suggested from a deviation of the acquired value or values for the variable characterizing the heater current from a predeterminable reference value, which represents a reducing agent tank without cavities.Type: ApplicationFiled: March 23, 2010Publication date: September 23, 2010Applicant: Robert Bosch GMBHInventors: Georgios Lolas, Wolfgang Klenk, Andreas Wagner
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Publication number: 20080053077Abstract: A procedure is introduced to operate a diesel engine (10), which has a catalytic converter (24; 26) with three-way conversion characteristics. The procedure is characterized thereby, in that if the engine rotational speed (n) increases without in the process exceeding an engine rotational speed threshold value (n_S) and the engine's load (mk) is greater than a load threshold value (mk_S), the diesel engine (10) is operated in such a manner that the diesel engine (10) alternately generates an oxidizing and a reductive exhaust gas atmosphere before the catalytic converter (24; 26). Additionally a control unit (14) is introduced, which controls the sequence of the procedure.Type: ApplicationFiled: September 4, 2007Publication date: March 6, 2008Applicant: Robert Bosch GmbHInventors: Andreas Pfaeffle, Wolfgang Klenk, Frank Schweizer, Stefan Scherer, Andreas Schaffrath
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Patent number: 7337658Abstract: A method is described for operating an internal combustion engine, in particular of a motor vehicle. In the method, a lean air/fuel mixture is burned in a combustion chamber; nitrogen oxides contained in the exhaust gas are stored in an accumulator-type catalytic converter; a storage efficiency, with which the accumulator-type catalytic converter stores the nitrogen oxides contained in the exhaust gas, is ascertained; and the storage efficiency is ascertained as a function of an instantaneous space velocity of the exhaust gases in the accumulator-type catalytic converter. Two efficiencies are ascertained at least as a function of the temperature of the accumulator-type catalytic converter and a space velocity. One of the two efficiencies is ascertained for a great space velocity, and the other efficiency is ascertained for a small space velocity. The storage efficiency is ascertained as a function of the instantaneous space velocity from the two efficiencies.Type: GrantFiled: April 6, 2004Date of Patent: March 4, 2008Assignee: Robert Bosch GmbHInventors: Andreas Pfaeffle, Wolfgang Klenk, Stefan Scherer, Simone Neuberth, Albrecht Schwaderer
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Publication number: 20070163231Abstract: A method is described for operating an internal combustion engine, in particular of a motor vehicle. In the method, a lean air/fuel mixture is burned in a combustion chamber; nitrogen oxides contained in the exhaust gas are stored in an accumulator-type catalytic converter; a storage efficiency, with which the accumulator-type catalytic converter stores the nitrogen oxides contained in the exhaust gas, is ascertained; and the storage efficiency is ascertained as a function of an instantaneous space velocity of the exhaust gases in the accumulator-type catalytic converter. Two efficiencies are ascertained at least as a function of the temperature of the accumulator-type catalytic converter and a space velocity. One of the two efficiencies is ascertained for a great space velocity, and the other efficiency is ascertained for a small space velocity. The storage efficiency is ascertained as a function of the instantaneous space velocity from the two efficiencies.Type: ApplicationFiled: April 6, 2004Publication date: July 19, 2007Inventors: Andreas Pfaeffle, Wolfgang Klenk, Stefan Scherer, Simone Neuberth, Albrecht Schwaderer
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Patent number: 6964266Abstract: The invention relates to a 3/2-port directional-control valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, with a first switched position in which an injection nozzle is connected to a fuel return and with a second switched position in which the injection nozzle is connected to a high-pressure fuel reservoir. The beginning of the injection takes place in a pressure-controlled manner, whereas the end of the injection takes place in a stroke-controlled manner.Type: GrantFiled: January 22, 2002Date of Patent: November 15, 2005Assignee: Robert Bosch GmbHInventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Patent number: 6874476Abstract: The invention relates to a 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a first switching position, in which an injection nozzle is in communication with a fuel return, and a second switching position, in which the injection nozzle is in communication with a common rail. To improve the function and quality of the injection, the 3/2-way valve includes two force-balanced control pistons, which are guided separately from one another, and on each of which a respective valve seat edge is embodied.Type: GrantFiled: March 15, 2002Date of Patent: April 5, 2005Assignee: Robert Bosch GmbHInventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Patent number: 6837451Abstract: The invention relates to a 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a first switching position, in which an injection nozzle is in communication with a fuel return, and having a second switching position, in which the injection nozzle is in communication with a high-pressure fuel reservoir. To improve the function and quality of the injection, the 3/2-way valve includes a force-balanced control piston, and the control edge of the control piston is pressure-equalized by means of a blind bore.Type: GrantFiled: March 12, 2002Date of Patent: January 4, 2005Assignee: Robert Bosch GmbHInventors: Nestor Rodriguez-Amaya, Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack, Hubert Greif
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Patent number: 6769634Abstract: In a fuel injection nozzle having a nozzle body which body has one first and one second group of injection ports, one first and one second nozzle needle, and one separate pressure chamber for each nozzle needle, so that the injection needles are adjustable independently of one another between a closed position, in which the injection ports associated with the corresponding nozzle needle are closed, and an injection position, in which the corresponding injection ports are opened, a free choice of injection cross sections is to be made possible, while the design is simple. To that end, it is provided that the two nozzle needles adjoin one another.Type: GrantFiled: February 19, 2002Date of Patent: August 3, 2004Assignee: Robert Bosch GmbHInventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Patent number: 6764058Abstract: A control valve and a fuel injection valve provided with same should be produced, in which it is possible to switch from a first operating state to a second operating state inexpensively and with short switching times, without requiring a hydraulic control line. To this end, a control valve is provided, which has a valve housing, a pressure chamber filled with electrorheological fluid, a displacing element that can slide in the valve housing and protrudes into the pressure chamber, and two electrodes that can apply an electrical field to the electrorheological fluid.Type: GrantFiled: October 22, 2001Date of Patent: July 20, 2004Assignee: Robert Bosch GmbHInventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Publication number: 20040134466Abstract: The invention relates to a 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a first switching position, in which an injection nozzle is in communication with a fuel return, and a second switching position, in which the injection nozzle is in communication with a common rail.Type: ApplicationFiled: July 2, 2003Publication date: July 15, 2004Inventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Patent number: 6745750Abstract: A fuel injection system, having a fuel injection valve and a control valve, which control valve has a control valve member that is longitudinally displaceable in a control valve bore. A control valve sealing face is embodied on the control valve member; it cooperates with a control valve seat and thus controls the communication between a first pressure space and a second pressure space; the first pressure space communicates with a high-pressure collection chamber. In a valve body, a bore is embodied in which a pistonlike valve needle, with its end toward the combustion chamber, controls the opening of at least one injection opening by executing a longitudinal motion in response to the pressure in a pressure chamber; the pressure chamber communicates with the second pressure space via an inlet conduit.Type: GrantFiled: November 25, 2002Date of Patent: June 8, 2004Assignee: Robert Bosch GmbHInventors: Walter Egler, Giovanni Ferraro, Hansjoerg Egeler, Achim Brenk, Wolfgang Klenk, Peter Boehland, Werner Teschner, Sebastian Kanne, Ingolf Kahleyss, Uwe Gordon, Manfred Mack
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Publication number: 20040089268Abstract: In a pressure-controlled fuel injection apparatus (1) with a common rail, an injector (5), and a metering valve (6) for controlling the injector (5), the metering valve (6) is integrated into the common rail. This reduces the production cost for the fuel injection apparatus (1).Type: ApplicationFiled: July 23, 2003Publication date: May 13, 2004Inventors: Achim Brenk, Wolfgang Klenk, Roland Bleher, Uwe Gordon, Manfred Mack
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Publication number: 20040069274Abstract: The invention relates to a 3/2-port directional-control valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, with a first switched position in which an injection nozzle is connected to a fuel return and with a second switched position in which the injection nozzle is connected to a high-pressure fuel reservoir. The beginning of the injection takes place in a pressure-controlled manner, whereas the end of the injection takes place in a stroke-controlled manner.Type: ApplicationFiled: February 10, 2003Publication date: April 15, 2004Inventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Patent number: 6691935Abstract: In an injection nozzle for a fuel injection system, the opening stroke of the nozzle needle is to be limited selectively, so that different injection cross sections can be employed. To that end, the injection nozzle is provided with a nozzle body, a nozzle needle displaceable in the nozzle body, two groups of injection ports, which are uncovered as a function of an opening stroke of the nozzle needle, a piston that is connected to the nozzle needle, a stop chamber in which the piston is disposed and which is provided with an outlet, and a control valve that can open and close the outlet of the stop chamber, as a result of which the stroke of the piston in the stop chamber and thus the opening stroke of the nozzle needle can be selectively limited.Type: GrantFiled: March 4, 2002Date of Patent: February 17, 2004Assignee: Robert Bosch GmbHInventors: Detlev Potz, Gerhard Mack, Achim Brenk, Wolfgang Klenk, Thomas Kuegler, Roland Bleher, Uwe Gordon, Manfred Mack
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Patent number: 6637409Abstract: In a fuel injection system for internal combustion engines, including an electronically triggered control valve with an axial through bore, which is divided by two valve seats into three annular chambers, to which respectively a supply line for fuel at high pressure, a high-pressure line leading away to an injection valve, and a relief line are connected, and having a control piston, which is guided in the through bore and which has two valve sealing faces cooperating with the two valve seats, respectively, the control piston according to the invention has a further valve sealing face, which cooperates with the first valve seat and whose spacing from the first valve sealing face is at least equal to the spacing between the second valve sealing face and the second valve seat when the first sealing seat is closed. A communication between the supply line and the relief line is thus reliably prevented.Type: GrantFiled: June 13, 2002Date of Patent: October 28, 2003Assignee: Robert Bosch GmbHInventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Publication number: 20030172978Abstract: The invention relates to a 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a first switching position, in which an injection nozzle is in communication with a fuel return, and having a second switching position, in which the injection nozzle is in communication with a high-pressure fuel reservoir.Type: ApplicationFiled: May 9, 2003Publication date: September 18, 2003Inventors: Nestor Rodriguez-Amaya, Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack, Hubert Greif